Triple

Given a phrase, classify it is english named entity (e.g., persons, organizations, works of art) in Latin script, or not (e.g., literals, dates, URLs, verbose phrases). For disambiguation, the statement where the phrase occurs as object is also given. Please return a JSON object with `phrase` (string, the phrase being analyzed) and `is_ne` (boolean, indicating whether the phrase is a Named Entity).

Phrase: Joan Yarde-Buller | Statement: [Aga Khan IV, mother, Joan Yarde-Buller]

Target entity: Joan Yarde-Buller
Context triple: [Aga Khan IV, mother, Joan Yarde-Buller]

• A. Susan Cunliffe-Lister, Dowager Countess of Swinton
  Susan Cunliffe-Lister, Dowager Countess of Swinton, is a British aristocrat and public servant known for her ceremonial and civic leadership in Yorkshire.
• B. Cynthia Curzon
  Cynthia Curzon was a British aristocrat and political figure, the daughter of statesman Lord Curzon, who became closely associated with interwar right-wing politics through her marriage to Oswald Mosley.
• C. Alexandra Mary Hilda Cadogan
  Alexandra Mary Hilda Cadogan was a British aristocrat and socialite who became Duchess of Marlborough through her marriage to John George Vanderbilt Henry Spencer-Churchill.
• D. Dorothy Savile, Countess of Burlington
  Dorothy Savile, Countess of Burlington, was an 18th-century British aristocrat and artist known for her role in the cultural and social circles surrounding the influential architect and patron Richard Boyle, 3rd Earl of Burlington.
• E. Kathleen Cavendish, Marchioness of Hartington
  Kathleen Cavendish, Marchioness of Hartington was an American socialite and member of the Kennedy family who married into the British aristocracy and died tragically in a 1948 plane crash.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Generate a one-sentence description of the target entity. 
You are given a context triple in the form (subject, predicate, object), where the object is the target entity. 
# Instructions
Use the triple to infer relevant information about the entity. Describe the entity based on what is most defining, well-known. 
Avoid repeating the information from the triple, unless really essential.
# Response Format
Return only the sentence: "Description: [one-sentence description of the target entity]"

Entity: Joan Yarde-Buller
Triple: [Aga Khan IV, mother, Joan Yarde-Buller]

Joan Yarde-Buller was a British socialite from an aristocratic family who became the mother of Aga Khan IV through her marriage into the prominent Aga Khan dynasty.

Target entity: Joan Yarde-Buller
Target entity description: Joan Yarde-Buller was a British socialite from an aristocratic family who became the mother of Aga Khan IV through her marriage into the prominent Aga Khan dynasty.

• A. Susan Cunliffe-Lister, Dowager Countess of Swinton
  Susan Cunliffe-Lister, Dowager Countess of Swinton, is a British aristocrat and public servant known for her ceremonial and civic leadership in Yorkshire.
• B. Cynthia Curzon
  Cynthia Curzon was a British aristocrat and political figure, the daughter of statesman Lord Curzon, who became closely associated with interwar right-wing politics through her marriage to Oswald Mosley.
• C. Alexandra Mary Hilda Cadogan
  Alexandra Mary Hilda Cadogan was a British aristocrat and socialite who became Duchess of Marlborough through her marriage to John George Vanderbilt Henry Spencer-Churchill.
• D. Dorothy Savile, Countess of Burlington
  Dorothy Savile, Countess of Burlington, was an 18th-century British aristocrat and artist known for her role in the cultural and social circles surrounding the influential architect and patron Richard Boyle, 3rd Earl of Burlington.
• E. Kathleen Cavendish, Marchioness of Hartington
  Kathleen Cavendish, Marchioness of Hartington was an American socialite and member of the Kennedy family who married into the British aristocracy and died tragically in a 1948 plane crash.
• F. None of above. chosen